Final answer:
The fibula articulates with the tibia at the knee and with the talus at the ankle, forming two crucial joints.
Step-by-step explanation:
The fibula articulates with two bones in the skeleton: the tibia and the talus. The head of the fibula articulates with the underside of the lateral condyle of the tibia, forming the proximal tibiofibular joint.
The distal end of the fibula, known as the lateral malleolus, articulates with both the fibular notch of the tibia and the talus at the ankle joint. The talus is a tarsal bone that plays a critical role in the ankle joint, making connections with the distal ends of both the tibia and the fibula.